The answer is that the MFA policy denies the iam:ListMFADevices action because the policy blocks all API calls without an MFA-authenticated session. This creates a catch-22: users cannot list their own MFA devices to enroll a new device or manage existing ones, since the ListMFADevices call itself is denied before MFA is established. On the AWS Certified SysOps Administrator Associate SOA-C02 exam, this scenario tests your understanding of how explicit deny in IAM policies interacts with service actions required for initial setup—a common trap is assuming the policy only affects post-authentication actions. The key insight is that the deny rule applies to the very action needed to configure MFA, so the policy must include an exception for iam:ListMFADevices when the user has no MFA session. Memory tip: think of it as the “MFA bootstrap paradox”—you need MFA to list devices, but you need to list devices to set up MFA.
SOA-C02 Security and Compliance Practice Question
This SOA-C02 practice question tests your understanding of security and compliance. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A company requires that all access to the AWS Management Console be protected by multi-factor authentication (MFA). The SysOps administrator has enabled an IAM policy that denies all actions if the user does not authenticate with MFA. However, some users report they cannot list their own MFA devices. What is the MOST likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The policy denies the iam:ListMFADevices action without an MFA-authenticated session
Option B is correct because the policy that denies actions without MFA also blocks the action to list MFA devices, which is needed to set up MFA. The policy should include an exception for the iam:ListMFADevices action. Option A is incorrect because the problem is not that users are not using MFA; it's that they cannot list devices to set up MFA. Option C is incorrect because the policy is not limited to a specific region. Option D is incorrect because IAM is not region-specific.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
The policy denies the iam:ListMFADevices action without an MFA-authenticated session
Why this is correct
The policy should allow iam:ListMFADevices without MFA to enable users to set up MFA.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The policy is applied to the root user only
Why it's wrong here
The policy is applied to IAM users.
✗
Users are not using MFA-enabled access keys
Why it's wrong here
The issue is about console access, not access keys.
✗
The policy is not applied in the us-east-1 region
Why it's wrong here
IAM actions are global.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
What to study next
Got this wrong? Here's your next step.
Identify which SOA-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Security and Compliance — This question tests Security and Compliance — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The policy denies the iam:ListMFADevices action without an MFA-authenticated session — Option B is correct because the policy that denies actions without MFA also blocks the action to list MFA devices, which is needed to set up MFA. The policy should include an exception for the iam:ListMFADevices action. Option A is incorrect because the problem is not that users are not using MFA; it's that they cannot list devices to set up MFA. Option C is incorrect because the policy is not limited to a specific region. Option D is incorrect because IAM is not region-specific.
What should I do if I get this SOA-C02 question wrong?
Identify which SOA-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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